LibreElec - CEC Keyboard Mapping - Options Menu

1st Official Post

    I've installed LibreElec on a Raspberry PI and things are generally working well, I'm using HDMI-CEC so that I can use my Samsung TV's remote control this is also working. There's an menu that I need to use the remote control for, I think it's called 'Options' this is what it shows on the screen, menu pops out from the left hand side of the screen?

    I therefore thought it would be a simple process of adding:

    <yellow>ContextMenu</yellow>

    To the xml file:

    /storage/.kodi/userdata/keymaps/keyboard.xml

    I've removed the exiting entry for the Yellow button my questions are:

    Am I editing the correct file?

    What is the correct entry to enable the options menu?

    Thanks